For your trinkets, the priority is, in theory: Haromm's Talisman, Ticking Ebon Detonator, and Assurance of Consequence. In practice, Assurance of Consequence is extremely good on a lot of fights because the proc has an internal cooldown, meaning that the procs can be predicted and tracked, allowing you to make the best of them. Also, it reduces the cooldown of Cloak of Shadows, which makes it an excellent trinket for progression (so excellent that it is almost mandatory for the execution of certain strategies on Siegecrafter Blackfuse and Garrosh Hellscream in Heroic Mode).
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